My university taught Haskell in their intro programming class at the mathematics departments, and the students that were new to programming had on the whole no

My university taught Haskell in their intro programming class at the mathematics departments, and the students that were new to programming had on the whole no problem with it. The ones that struggled were the ones that knew a bit of programming and had to relearn a bunch of what they thought they 'knew' about programming. The problem was that all the students who had just been introduced to programming via Haskell where completely lost when they took the next intermediate programming class, which used Java.